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Test Code Ca Ion Ionized Calcium

Important Note

Place specimen in outside pocket of a pre-filled biohazard bag of ice, then put into a separate biohazard bag for transport.

Clinical System Name

Calcium Ionized

Synonyms

CA ++

Sample Requirements

Specimen: Whole Blood

Container(s): Heparinized Syringe, Capillary Blood Gas Tube

Preferred Vol: 0.5 mL in a Heparinized Syringe, or 2 Capillary Blood Gas Tubes.

Minimum Vol: 2 Heparinized Capillary Blood Gas Tubes. (EPOC capillary tubes are not acceptable).

 

Note: Use only Heparinized syringe with dry Lithium Heparin for gases and electrolytes or heparinized capillary blood gas tubes. Sample can be shared with a CBG if capillary blood gas tubes are collected. Send to the lab immediately. Avoid air bubbles. Expel air from syringe and cap it immediately after obtaining the sample. Capillary blood gas tubes must be filled completely and mixed thoroughly to dissolve and disperse the heparin; EPOC capillary tubes are not acceptable. Ideally, whole blood specimens should be analyzed within 15 minutes of blood draw.

Processing Instructions

Reject due to: Inadequately filled specimens, air bubbles, visible clots, age of specimen

Spin: N

Aliquot: N

 

Off-site collection: Samples collected outside Children's may be drawn in a balanced heparin syringe and sent at 0-4o C within 4 hours.

Stability

 

Specimen Type Temperature Time
Heparinized Syringe, Heparinized Capillary Blood Gas Tube RT ≤ 15 min.
Heparinized Syringe, Heparinized Capillary Blood Gas Tube 0-4o C 4 H
Heparinized Syringe, Heparinized Capillary Blood Gas Tube -20o C or -70oC No

 

Availability

STAT Performed TAT
Y 24/7 15 M

 

Performing Laboratory

Seattle Children's Laboratory    

Department

Department:  Chemistry - Core

Phone Number: 206-987-2617

Reference Range

 

 Age mMol/L
<1 Y 1.16 - 1.45
1 - 4 Y 1.17 - 1.35
4 - 14 Y 1.18 - 1.30
> 14 Y 1.18 - 1.27

 

Methodology

Method: Potentiometric method by SIEMENS RAPIDPOINT 405

 

Analytical Volume:

AGE VOLUME
0-2 Y  0.2 mL Heparinized Capillary Blood Gas Tube
> 2 Y 0.5 mL Heparinized Syringe

 

CPT Codes

82330

Critical Values

≤ 0.75 mMol/L

 

≥ 1.75 mMol/L